Well, since the forum was founded nearly 12 years ago, I think you may be the first person to have ever brought this up? MR really is mostly about art and stories, so no, card games have never factored into that?

We only create boards when there is a large demand for something. When we see people posting topics about something that clearly don't fit in where they are. So for now, I suggest you post any such topics in the video games board.